Auto-aerial ladder-truck.



PATENTED APR. 1'7

H. T. KINGSBURY. AUTO-AERIAL LADDER TRUGK.

APPLIOAT ION FILED SEPT. 29, 1905.

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No. 818,262. PATENTED APR.1'7, 1906. H. T. KIN'GSBURY.

AUTO-AERIAL LADDER TRUCK. APPLICATION FILED SEPT.29, 1905.

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AUTO-AERIAL LADDER TRUCK.

Specification of Letters Patent.

Patented April 1'7, 1906.

Application filed September 29, 1905- Serial No. 280,642.

To all whom it Wwty concern:

Be it known that I, HARRY T. KINGSBURY, a citizen of the United States,risiding at Keene, inthe county of Cheshire, State of New Hampshire,have invented certain new and useful Improvements in Auto-AerialLadderTrucks, of which the following is a description, reference beinghad to the accompanying drawings, and to the figures of refer encemarked thereon.

The principal object of the present invention is to provide a novel andattractive toy in the form of a ladder-truck in which the truck ispropelled by a suitable motor and carries an automatically-raisedladder.

A further object of the invention is to provide such a device with anovel form of sectional ladder so arranged as to enable one section toslide lengthwise on the other and to provide a novel mechanism forelevating said ladder.

A still further object of the invention is to provide a sectional ladderso constructed that both sections may be raised from an approximatelyhorizontal to an approximately vertical plane before the upper sectionis allowed to slide upward.

A still further object of the invention is to provide a cheap andefficient form of ladderelevating mechanism and to employ means forcontrolling the speed at which it operates.

With these and other objects in view my invention consists in theconstruction and com bination of elements hereinafter described,illustrated in the accompanying drawings, and particularly pointed outin the claims.

Referring to the drawings, Figure 1 is a side elevation, partly insection, of a toy constructed in accordance with the invention. Fig. 2is a similar view of the front end of the device, the ladder beingelevated. Fig. 3 is a section on line 3 3, Fig. 1; and Fig. 4 is a rearend elevation of the ladder-sections. Fig. 5 is a detail face view ofthe catch 37.

Similar numerals of reference are employed to indicate correspondingparts throughout the several figures of the drawings.

The truck is preferably formed of stamped sheet metal and compriseslongitudinal sills 1, mounted on suitable front and rear wheeled axles 23. The rear axle includes a driven member that is propelled by aspring-motor 4, having a suitable winding-key 5, the motor driving oneor both of the rear wheels, and thus propelling the truck.

Secured between the longitudinal sills,

near the front of the truck, is a U-shaped metallic frame 8, carrying across-bar9, on which are pivoted the lower ends of the side rails of aladder-section 10. The ladder includes also a section 11, which slideson the section 10 and is uppermost when the ladder is fully elevated.

Theladder-sections are slidably connected by two sets of guide-clips 1314, one set 13 being secured to the section 10 and embracing the siderails of the section 11, while clips 14 are secured to the section 11and embrace the side rails of the section 10. The clips 14 are furtherprovided with laterally-projecting lugs 15, that enter arcuate slots 16,formed in the arms of the frame 8. The slot is on an arc struck from theaxis of the crossbar 9, and its function is to prevent sliding movementof the upper ladder-section until both sections have been swung up to anapproximately vertical position.

In the frame 8 are openings for a transversely-extending spindle 20,carrying a winding-drum 21, to which is secured one end of a cord orchain 22, that extends over a guidingsheave 23, journaled. at the top ofthe frame, and over a second sheave 24, mounted on the end rung of theladder-section 10. The opposite end of the cord is secured to one of thelower rungs of the ladder-section 1 1.

When the ladder is lowered, its rear end is received on a rest 25, whichmay form a part of the motor-carrying frame, and the sides of' the resthave upturned lips or flanges 26 to revent lateral movement of theladder.

The ladder sections are elevated by a spring 28, the rear end of whichis secured to the frame, while the front end of said spring is securedto a cord 29, that extends around and is secured to the hub of thewinding drum 21.

To one end of the winding-drum is secured an escapement-wheel 30, withwhich engages a weighted anchor 31, pivoted to the frame, the weightbeing sufficient to retard the upward movement of the ladder, so that itwill rise gradually to position. When fully raised, the ladder is tiltedforward at a slight angle to the vertical, and the lowermost rung ofsection 10 abuts against the sheave 23 to prevent excessive movement.

Extending across the frame is a pivot-pin 36, on which is mounted acatch 37, arranged to engage one of the rungs of the ladder-section 10.The front cross-bar 38 of the frame has guiding-openings for the passageof the parallel arms of a U-shaped trip 39, the rear ends of said armsbeing pivoted in ears 40' on the catch. The front cross-bar of the tripprojects beyond the front of the frame, so that when it touches a wall,desk, table-leg, or other obstruction the catch will be thrown back,automatically releasing the ladder and allowing it to rise to thevertical position. The elevatingspring cannot act to throw the ladder upsuddenly, the speed being governed by the escapement mechanismpreviously described.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A toy ladder-truck, a ladder pivoted thereto, formed of a number of:slidably-connected sections, and means for elevating said ladder, andautomatic mechanism for controlling the speed of the elevating means.

2. A toy ladder-truck, a ladder pivoted thereto and formed of a numberof slidablyconnected sections, and a single operating means forfirstswinging the ladder to upright position, and then sliding the uppersection on the lower.

3. A toy ladder-truck, a ladder pivoted thereto,'said ladder beingformed of a number of sections, guide-clips connecting said sections, aladder elevating and extending means, and means for preventing slidingmovement of the upper section until both sections have been swung toapproximately vertical position.

4. A toy ladder-truck, a U-shaped frame carried thereby and providedwith arcuate slots, a ladder pivoted to the frame and comprisingslidably-mounted sections, guideclips connecting the sections, lugsprojecting from one set of clips and arranged to enter said actuateslots, a winding-drum, a cord passing from the drum to the lower portionof the upper ladder-section, an elevatingspring and a cord extendingbetween the spring and the hub of the winding-drum.

5. A ladder-truck, a pivoted ladder carried thereby, a ladder-elevatingmeans including a winding-drum, an escapement-wheel secured to thewinding-drum, and a weighted anchor engaging said esca ement-wheel.

In testimony whereof a'ffix my signature in presence of two witnesses.

HARRY T. KINGSBURY.

Witnesses:

W. L. MAsoN, G. H. SIIERWIN.

